Combine & Compress (css, js)

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According to Yahoo!'s Exceptional Performance Team , 40% to 60% of Yahoo!'s users have an empty cache experience and about 20% of all page views are done with an empty cache (see this article by Tenni Theurer on the YUIBlog for more information on browser cache usage ). http://yui.github.com/yuicompressor/

YUI Compressor

News 2012-03-10 Minify 2.1.5 released! We've also converted to git and are mirroring at GitHub .

minify - Combines, minifies, and caches JavaScript and CSS files on demand to speed up page loads.

http://code.google.com/p/minify/
http://www.electrictoolbox.com/combine-minify-javascript-php/

Combine and minify Javascript files with PHP

Posted July 16th, 2009 in Javascript and PHP
http://www.devirtuoso.com/2009/07/how-to-compress-cssjavascript-files-with-php/ A quick way to speed up your site is to simply limit how much the user has to download.

GZIP Compress CSS/JavaScript Files With PHP